linux-kernel - [PATCH v2] docs: ext4: modify the group desc size to 64

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Date:   Wed, 22 Feb 2023 09:35:24 +0800
From:   Wu Bo <bo.wu@...o.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Wu Bo <bo.wu@...o.com>, "Theodore Ts'o" <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Jonathan Corbet <corbet@....net>, linux-ext4@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] docs: ext4: modify the group desc size to 64

Since the default ext4 group desc size is 64 now (assuming that the
64-bit feature is enbled). And the size mentioned in this doc is 64 too.
Change it to 64.

Signed-off-by: Wu Bo <bo.wu@...o.com>
---
 Documentation/filesystems/ext4/blockgroup.rst | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/filesystems/ext4/blockgroup.rst b/Documentation/filesystems/ext4/blockgroup.rst
index 46d78f860623..ed5a5cac6d40 100644
--- a/Documentation/filesystems/ext4/blockgroup.rst
+++ b/Documentation/filesystems/ext4/blockgroup.rst
@@ -105,9 +105,9 @@ descriptors. Instead, the superblock and a single block group descriptor
 block is placed at the beginning of the first, second, and last block
 groups in a meta-block group. A meta-block group is a collection of
 block groups which can be described by a single block group descriptor
-block. Since the size of the block group descriptor structure is 32
-bytes, a meta-block group contains 32 block groups for filesystems with
-a 1KB block size, and 128 block groups for filesystems with a 4KB
+block. Since the size of the block group descriptor structure is 64
+bytes, a meta-block group contains 16 block groups for filesystems with
+a 1KB block size, and 64 block groups for filesystems with a 4KB
 blocksize. Filesystems can either be created using this new block group
 descriptor layout, or existing filesystems can be resized on-line, and
 the field s_first_meta_bg in the superblock will indicate the first
-- 
2.35.3